M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:

How many of the following modifications take place in post-transcription pre-mRNA transcripts within the nucleus?

1. Cleavage of mRNA into smaller transcripts
2. Splicing of exons; removal of introns
3. Glycosylation of various methionine amino acids
4. Attachment of a poly-A tail
5. Attachment of a 5'-Cap

A

None

B

All of the above

C

2 of the above

D

3 of the above